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The FASS DIFSRAM5001 Drop-In Series diesel fuel system fits 2025-2027 Ram 2500 and 3500 trucks with the 6.7L Cummins. Entrained air, vapor, water and fine debris all pass through the factory supply side, and that contamination wears the high-pressure pump and injectors early. This system cleans and de-aerates the fuel before it reaches the engine's filtration and injection components.
This is a filtration and air separation system, not a lift pump. It mounts in the factory location and works with the Ram in-tank fuel pump, so no pump wiring or tank work is required. An XWS3002XL extreme water separator and CWS1010 filter deliver 2 micron absolute filtration. No core required.
Key Features & Benefits
- Air/Vapor Separation: removes entrained air and vapor that cause erratic fueling and accelerated injection wear.
- Extreme Water Separation: pulls free and emulsified water out of the fuel before it reaches the injection system.
- 2 Micron Absolute Filtration: traps debris finer than factory filtration is designed to catch.
- Retains the OEM In-Tank Pump: plug-and-play design uses the factory supply pump, with no extra parts needed.
- Factory-Location Mounting: bolt-on bracket kit and fittings for an install of about one hour.
Technical Specifications
- Manufacturer: FASS Fuel Systems
- Part Number: DIFSRAM5001
- Product Type: Drop-In Fuel Filtration and Air Separation System
- Filtration: 2 micron absolute
- Filters: XWS3002XL water separator, CWS1010 filter
- Fuel Supply: retains the factory in-tank lift pump
- Truck Compatibility: 2025-2027 Ram 2500/3500
- Engine Platform: 6.7L Cummins
- Core Requirement: No core required
Vehicle Fitment & Technical Installation Notes
Fits 2025-2027 Ram 2500 and 3500 with the 6.7L Cummins. Cab and chassis trucks may require modifications, and the system may not clear aftermarket high-capacity fuel tanks. It is not compatible with a FASS fuel sump kit.
Installation Tip: Check clearance at the factory mounting location before starting if the truck has an aftermarket tank. After installation, prime the system with the key on and check every fitting for leaks before the first start.
The FASS DIFSRAM5001 Drop-In Series diesel fuel system fits 2025-2027 Ram 2500 and 3500 trucks with the 6.7L Cummins. Entrained air, vapor, water and fine debris all pass through the factory supply side, and that contamination wears the high-pressure pump and injectors early. This system cleans and de-aerates the fuel before it reaches the engine's filtration and injection components.
This is a filtration and air separation system, not a lift pump. It mounts in the factory location and works with the Ram in-tank fuel pump, so no pump wiring or tank work is required. An XWS3002XL extreme water separator and CWS1010 filter deliver 2 micron absolute filtration. No core required.
Key Features & Benefits
Air/Vapor Separation: removes entrained air and vapor that cause erratic fueling and accelerated injection wear.
Extreme Water Separation: pulls free and emulsified water out of the fuel before it reaches the injection system.
2 Micron Absolute Filtration: traps debris finer than factory filtration is designed to catch.
Retains the OEM In-Tank Pump: plug-and-play design uses the factory supply pump, with no extra parts needed.
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The FASS DIFSRAM5001 Drop-In Series diesel fuel system fits 2025-2027 Ram 2500 and 3500 trucks with the 6.7L Cummins. Entrained air, vapor, water and fine debris all pass through the factory supply side, and that contamination wears the high-pressure pump and injectors early. This system cleans and de-aerates the fuel before it reaches the engine's filtration and injection components.
This is a filtration and air separation system, not a lift pump. It mounts in the factory location and works with the Ram in-tank fuel pump, so no pump wiring or tank work is required. An XWS3002XL extreme water separator and CWS1010 filter deliver 2 micron absolute filtration. No core required.
Key Features & Benefits
- Air/Vapor Separation: removes entrained air and vapor that cause erratic fueling and accelerated injection wear.
- Extreme Water Separation: pulls free and emulsified water out of the fuel before it reaches the injection system.
- 2 Micron Absolute Filtration: traps debris finer than factory filtration is designed to catch.
- Retains the OEM In-Tank Pump: plug-and-play design uses the factory supply pump, with no extra parts needed.
- Factory-Location Mounting: bolt-on bracket kit and fittings for an install of about one hour.
Technical Specifications
- Manufacturer: FASS Fuel Systems
- Part Number: DIFSRAM5001
- Product Type: Drop-In Fuel Filtration and Air Separation System
- Filtration: 2 micron absolute
- Filters: XWS3002XL water separator, CWS1010 filter
- Fuel Supply: retains the factory in-tank lift pump
- Truck Compatibility: 2025-2027 Ram 2500/3500
- Engine Platform: 6.7L Cummins
- Core Requirement: No core required
Vehicle Fitment & Technical Installation Notes
Fits 2025-2027 Ram 2500 and 3500 with the 6.7L Cummins. Cab and chassis trucks may require modifications, and the system may not clear aftermarket high-capacity fuel tanks. It is not compatible with a FASS fuel sump kit.
Installation Tip: Check clearance at the factory mounting location before starting if the truck has an aftermarket tank. After installation, prime the system with the key on and check every fitting for leaks before the first start.